[Unit]
Description=Run myscript every minute

[Timer]
# OnCalendar=*:0/1 means every minute (minute 0, 1, 2, etc.)
OnCalendar=*:0/1
# AccuracySec=1s ensures it runs as close to the minute as possible
AccuracySec=1s
# Persistent=true ensures it runs if the system was off during the schedule
Persistent=true

[Install]
WantedBy=timers.target